Patents by Inventor Das Sumitesh

Das Sumitesh has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for synthesizing reduced graphene oxide on a substrate from seedlac
    Patent number: 9617159
    Abstract: The present invention relates to synthesizing reduced graphene oxide on the surface of a metal sheet and glass. The invention particularly relates to a process for coating a substrate with reduced graphene oxide using seedlac as a carbon source. As per the process of the current invention, a solution of seedlac is prepared in an alcohol and the substrate is dipped in to the solution for one or more time. The substrate is then dried in air for 1-10 minutes and thereafter, heated to a temperature range of 400 to 1200° C. under controlled atmosphere of Ar/N2/Ar—H2/N2—H2 at a different flow rate ranging from 100 to 500 seem for a period of 10 to 120 minutes.
    Type: Grant
    Filed: May 8, 2014
    Date of Patent: April 11, 2017
    Assignees: Council of Scientific and Industrial Research, Tata Steel Limited
    Inventors: Kumar Choudhary Shyam, Kumar Bhadu Manish, Kumar Rout Tapan, Das Sumitesh, Kumar Sahu Ranjan, Narayan Singhbabu Yashabanta, Kumar Pramanick Ashit, Chandra Srivastava Vikas
  • Process for Synthesizing Reduced Graphene Oxide on a Substrate from Seedlac
    Publication number: 20160185604
    Abstract: The present invention relates to synthesizing reduced graphene oxide on the surface of a metal sheet and glass. The invention particularly relates to a process for coating a substrate with reduced graphene oxide using seedlac as a carbon source. As per the process of the current invention, a solution of seedlac is prepared in an alcohol and the substrate is dipped in to the solution for one or more time. The substrate is then dried in air for 1-10 minutes and thereafter, heated to a temperature range of 400 to 1200° C. under controlled atmosphere of Ar/N2/Ar—H2/N2—H2 at a different flow rate ranging from 100 to 500 seem for a period of 10 to 120 minutes.
    Type: Application
    Filed: May 8, 2014
    Publication date: June 30, 2016
    Inventors: Kumar Choudhary Shyam, Kumar Bhadu Manish, Kumar Rout Tapan, Das Sumitesh, Kumar Sahu Ranjan, Narayan Singhbabu Yashabanta, Kumar Pramanick Ashit, Chandra Srivastava Vikas